Picker-stick check for looms.



T. NEVIN.

' PIGKEB STICK CHECK FOR LOOMS.

Patentefi Mia-212, 1909.

APPLICATION FILED JULY 7, 1908.

niwrdin STAT THGMAS NEVKN, OF LOWELL, MASSACHUSETTS, ASSIQNOR TO DRAPER CGMPANY, OF HOPEDALE, MASSACHUSETTS, A GORPORATION OF MAINE.

IPIUBER-STECK LOQMS,

Specification of Letters Patent.

Patented March 2, 1909.

c i may concern:

that

States, and resident of lesex, State of ill: n

ed on Improvement 1 for Looms, or ription, in connection accompanying drawing, is a specm 1on4, like numerals on the drawing representing like. I l

My present invention relates to stick checks for looms and. it has for its 3 the production of improved nenns for ching the outward movement of the. poker stick, when subjected to the impact of Jllt) shuttle, the construction being such tl'ralt the freedom or mow A?" not ofthe stick on i'tsjinword stroke is impaired or interfered. within...the .lsestby the. checking means.

have made provision. for easily and quickly adjusting-theresistance of the checking means, as may be rendered necessary in the practical operation of the loom, and the checking action can alsobe varied as to its duration in every sirntle manner.

One practical embo iment of my invention lsfully described in the subjolned specificotion and its novel features are particularly pointed out and emphasized in the following claims,

Figure 1 is a front elevation of a portion of the picking mechanism at one side of a loom, with one embodiment of my prcsent invention applied thereto, the picker-stick being shown nearly at the end of rts outward stroke; Fig. .2 is a left-hand end elevation of the picker-stick check, the stick beingshown in dotted lines; Fig, 3 is a detail of a part of the checking means to be referred to.

Referring to Fig. l, the loom-side 1, lay rocker-shaft 2 having fast thereon the pickcr-stlok stand 3, the picker-stick 4 havmg attached to its lower end a shoe 5 resting and rocking upon the flat top-of the stand 3, the spring-controlled strap 6 mounted on the stand and attached at its free end to the end of the stick depending below the stand and the higstrep Zoonnccting the picker-stick with the pickunotlon, may be and are all of well known construction and operate in usual manner. The stand 3 has secured. to or forming part of it an outwardly extended arm 8 on which is adjustably secured, by a.

ring material, cooperating with a like facing I let, see Fig. 2, on the disk-like port 1? 9. ratchet 16, the latterbeing rotstablymoont on n spindle l'iextended through the b; disk and friction pads. 'lhe splr. .v is preferably squared, as at 18, 3, to it o, corres" ondingly shaped hole in the bracket, 't-vhere 3y the spindle is restrained from rots.

Z annular enlargement s ngoinst the front as o v r t Alec sp :r111g 20 mtorpommlrct 1 oheclr nuts 21 sets to; draw the friction sure faces together, the ressure being raided adjustment of the c och-nuts. I From the foregoing description itwill manifest that rotation of the ratchet will be resisted by the friction due to the-relatively movable pads 12 and 13, the checking action of the friction members being regulated by the adjustment of the spring 20.

A collar 22 is pinned onto the front end of stud 17 and between said collar and thesd W7. I v e book of the, bracket 11 and sorts le largement 19 I loosely mount the hub of on upturned pawl-carrier 23, carrying a pawl 24: cooperotmg wlth the ratchet 16, the upper end of the pawl-carrier being forwardly eX-' tended at 25 to form a hunter crossing the path of the picker stick on its outward stroke. A spring 26 coiled round tho spindle 17 has one end fixed to the collar :32 and itsother end 006 erating with the carrier to swing it to toeright, viewing :0 1 such spring-induced movement being lll'llr W by engagement of a pin 27 '(Hl the, pawl-con rier abutting against the inner end of a recess 28 in the The spring 25 is a setting device to autonni icallyretraot or set the pawl 24 etits stcrtlrrg point when the picker-stick is moved inward to ick the shuttle end that the pawl '24 is at its starting point,

the ratchet 16. When 1n engagement with the hunter 2;; it will.

the picker-stick hits periphery of'thc enlargement l9.

I gularly che k,

--and brm mg 'outer en of its outward stroke.

rock pawl-carrier 2 3 to the left, Fi 1, and the pawl will rotate the ratchet an the an- -movable friction member of the to a stopthepicker-stick at the On the inward stroke of the picker-stick it will be no- -'.t1ced that the checking means has no control or influence, so that the stick is perfectly free to be operated by the picking mechanism. As the stick moves inward, the spring 26 acts upon the pawl-carrier andmoves the latter pawl will" n the same direction till the pin .27 engages the end of the recess 28, stoppmg the pawl 24 at the proper pomt'for the beginning of its.

evident, -and by loosening the bolt 9 and ke up more teeth on the ratchet I and the action of the check on the pickeradjustment stick will be of longer duration. Conversely, by moving the bracket to the left less teeth will be taken up by the ratchet and the checking action will be shortened. The

- action is inde endent. of the adjustment, by

soow'er of the check, and by using either adustnient, or. by comb' .close and fine checking action can be effected,-

' checking the weight of has been proposed heretofore,

spring an check-"nuts 21, of the force or ming 1 them, a very i according to varied rerpnrements in the'prac- 'tical operation of the oom. It willbe noted that the checking means is brought down as near asspossible to the lay rocker-shaft by mounting said means on the v stand 3 which is fast on the rocker-shaft, and

this disposition of the added weight of the means is-of' the greatest advantage. It will be manifest that in high speed looms. the lay makes from reater than is decannot be 0 viated. To add the checking means to the top. of the lay, or just under the shuttle-box, as increases the due to momentum of the movsirable, but it disadvantages ing parts-by adding weight at a distance from the-center or axis about which the la'* swings. By carrying the added weight low own and 1 very near heaxis about which the lay swings,

. ;as Ihave done herein, the. checking mechanism does not to any.

appreciable extent increase disadvantages the retarding action due to the fric- "'tlon between the pads 13 and 14 checking parting bracketto the right, Fig. 1, the

as to the'duration of the checking 170 tonearly 200 picksper minute, and at best the momentum of the moving parts is much 1 an thereby vary the the added weight of a aeco already existing due to momentum of the moving parts.

Various changes or modifications may be made in details of construction andarran ement by those skilled in the art without evention as set forth in the annexed. claims.

Having fully described my invention, what ters Patent is g 1. In a device of the class described, a

from the spirit and scope of my 111-- I claim as new and desire to secure by- Letpicker-stick, and a stand on which" it is mounted to rock, and a bracket fixedly secured to the stand, combined with a pickerstick check adjustably mounted on the bracket and comprising fixed and rotatable cooperating friction members, a ratchet fixedly attached to the rotatable member, a swinging pawl-carrier having a pawl cooperating with the ratchet, a buriter on the pawl-carrier, tobe engaged and moved'by the picker-stick on its outward stroke, to ef fect rotative movement of the ratchet and attached friction member and thereby check the stick, a" spring to return thepawl-carrier to starting position when the picker-stick moves inward, whereby the pawl is set for the next operative stroke independently of the stick, and astop to limit spring-induced movement of the pawl-carrier. 2. In a device of the class described,-a'

picker stick, and a stand on which it is mounted to rock, combined with a ickerstick check mounted on thestand an comprising fixed and rotatable cooperating1 friction members, a ratchet attached to erotatable member, a swinging pawl-carrier having a pawl cooperating with the ratchet,

ward stroke, to effect rotative movement of a hunter on the pawl-carrier, to be engaged I and moved by thepicker-stick on its outthe ratchet and attached friction member and thereby check the stick, a spring to set the pawl-carrier ior'the next operative stroke of the pawl, and means to adjust the position of the check bodily on the stand to vary the len h of the-operative stroke of the pawl duration of the checkiil action on the picker-stick.

, n testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

Ones. H.- Coiveirr, I Bnssmn. B AM. 

